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the active workbook as default.

=item log

A logger object equipped with C<debug>, C<info> and C<warning> methods.
If none is supplied, a simple logger is automatically created from L<Log::Dispatch>.

=item UTF8

A boolean flag for setting the L<Win32::OLE> codepoint option to UTF8, so that
strings are properly encoded/decoded between Perl and the OLE server.
It is highly recommended to I<systematically set this option to true>, since
this module is mostly used together with L<YAML>, which uses UTF8 encoding.

This option will automatically trigger C<< Win32::OLE->Option(CP => CP_UTF8) >>
at object construction time, and will set it back to the previous value at object
destruction time. Beware however that this is a change in global state, so if
your program performs other operations through L<Win32::OLE> during the lifetime
of the C<Excel::PowerPivot::Utils> object, string handling might be affected.
This is the reason why we require this option to be set explicitly instead of
being enabled automatically by default.